ESP32-S31

# ESP32-S31 Dual-Core RISC-V + Multi-Protocol SoC Source: [https://www.espressif.com/en/products/socs/esp32-s31](https://www.espressif.com/en/products/socs/esp32-s31) ### Comprehensive Connectivity ESP32\-S31 integrates both**wireless and wired**connectivity for versatile networking\. It supports 2\.4 GHz Wi\-Fi 6 \(802\.11ax\) for**enhanced transmission efficiency and reduced power consumption**, making it ideal for battery\-powered and always\-connected devices\. IEEE 802\.15\.4 enables Thread and Zigbee protocols, and Bluetooth®5\.4 \(LE\) supports LE Audio for high\-quality, low\-power audio streaming, Direction Finding, and Bluetooth Mesh 1\.1 for scalable many\-to\-many device communication\. While Bluetooth Classic \(BR/EDR\) ensures compatibility with legacy audio devices and low\-latency HMI applications\. Also, the 1000 Mbps Ethernet MAC provides stable, high\-bandwidth wired connectivity for IoT applications\. ### System and Memory ESP32\-S31 is a**dual\-core 32\-bit RISC\-V**microcontroller running at**320 MHz**with MMU support providing 6\.86 CoreMark/MHz processing performance and**60 GPIOs**for design flexibility\. One core features a wide 128\-bit data path with SIMD instructions, enabling fast parallel processing\. The SoC provides 512 KB SRAM and 250 MHz 8\-bit DDR PSRAM connectivity with simultaneous flash and PSRAM access\. Multiple dedicated SPI interfaces, compatible with high\-speed Octal SPI mode, enable flexible external memory expansion\. ### Advanced HMI Support ESP32\-S31 provides comprehensive human\-machine interface capabilities for rich multimedia applications\. It features a DVP camera interface \(8 to 16\-bit\) and versatile LCD support \(8 to 24\-bit parallel RGB, I8080, MOTO6800\), supporting conversion between RGB565, YUV422, YUV420, and YUV411\. Dedicated hardware accelerators including JPEG codec, PPA, and 2D\-DMA enable**efficient image processing and display updates**\. Combined with up to 14 capacitive touch sensing channels, the ESP32\-S31 is ideal for**smart displays, video doorbells, multimedia panels**, and applications requiring**seamless touch, visual, and audio integration**\. ### Flexible Audio Integration The ESP32\-S31 delivers versatile audio capabilities across wireless and wired interfaces\. Bluetooth 5\.4 LE Audio enables high\-quality, low\-power streaming with**LC3 codec and multi\-stream audio**, while Bluetooth Classic \(BR/EDR\) ensures compatibility with headphones, speakers, and automotive systems\. Dual I2S controllers with hardware\-level Bluetooth audio synchronization provide precise timing and minimal latency, eliminating software\-based synchronization complexity\. ### Security ESP32\-S31 provides robust hardware\-based security for applications with stringent industry requirements\. A standout highlight is the integration of TRNG and RAM\-based PUF capabilities, providing a strong foundation for key generation and device security\. It also supports secure boot, flash and PSRAM encryption, and cryptographic accelerators including AES\-128/256, RSA, ECDSA, and ECC\. In addition, an ECDSA\-based digital signature peripheral protects private keys from software access, while**TEE**and APM enable software isolation for secure multi\-application deployment\. ### Software Availability ESP32\-S31 will be supported through Espressif's open\-source IoT Development Framework[ESP\-IDF](https://www.espressif.com/en/products/socs/en/products/sdks/esp-idf)、[ESP\-Matter](https://www.espressif.com/en/solutions/device-connectivity/esp-matter-solution#sdk-for-matter)\(for Matter devices\), ESP\-BLE\-AUDIO and[ESP\-GMF](https://github.com/espressif/esp-gmf)\(for multimedia applications\)\. ESP32\-S31 will also work with the[ESP Private Agents](https://developer.espressif.com/blog/2025/12/annoucing_esp_private_agents_platform/)platform as well as directly with common LLMs to build client devices that run or interact with AI agents to create voice\-enabled and intelligent applications\.